this weekend. daniel knottingham shows us why both parties are both predicting a win on tuesday. [music] >> reporter: mitt romney rallied supporters in cleveland, ohio, one of four battleground states the republican nominee is visiting sunday. >> if the president were to be reelected he would -- [booing] >> he would -- it is possible but not likely. [ laughter ] >> reporter: the race could come down to a single swing state. >> hello florida. >> they are hittinga as many as they can before election day. >> i need iowa! >> reporter: president barack obama took time to join president clinton in new hampshire that carries 4 of the votes needed to win. >> we have come too far to turn back now. >> reporter: both the romney and barack obama campaigns are predicting a victory on tuesday. but the polls show a very tight race with no clear favorite. >> if anyone has an edge it is the president because he needs fewer swing states to win the white house. >> i still think it is easier for the president to get the 270. not impossible for governor romney but all of the pieces have to fit together.